Apparatus for delivering fastening strips for wrapping machines



K. OTTING. APPARATUS FOR DELIVERING FASTENING STRIPS FOR WRAPPING MACHINES.

APPLICATION men MAY 12, 1921.

Patented Mar. 7, 1922.

. Inventor: W '6 ,6, 45 fitter/neg Witne ans 5% f an 3% UNITED STATES KARL OTTING, OF BERLIN, GERMANY, ASSIGNOR TO THE FIR-M: MAS

MASSENVERPACKUNG G. M. 13. IL,

PATENT OFFICE.

CHINEN FUR OF BERLIN, GERMANY.

il.Pl?i%.It.ATUS FOR DELIVERING FASTENING STRIPS FOR WRAPPING MACHINES.

Application filed May 12, 1921.

To all whom it may concern:

Be it known that I, KARL OTTING, a citizen of the German Republic, and residing at Berlin, Germany, have invented certain new and useful Improvements in Apparatus for Delivering Fastening Strips for rapping Machines, (for which I have filed an application in Germany September 6, 1919,) of which the following is a specification.

In the case of many articles consumed in large quantities which are wrapped by means of machinery, it is usual to place a fastening strip around the wrapper.

This is especially the case when a grease proof and water-proof wrapper is employed which is not suitable for receiving the imprint of the nature and origin of the wrapped article.

A fastening strip is also necessary because the actual wrapper does not allow of using adhesives for the purpose of closing the wrapper flaps, since the adhesive must be prevented from coming into contact with the wrapped article.

For the purpose of efiecting the mechanical delivery of the fastening strips to the wrapper, it has already been proposed to arrange above the supply track of the wrapper a magazine containing the fastening strips, which is caused, by the step-by-step advance of the wrapper, to move up and down for the purpose of delivering the bottom fastening strip.

After paste has been applied to the previousl cut wrapper, the latter is brought by means of a plunger from underneath up to the bottom strip of the pile of fastening strips in the magazine.

in order to provide the bottom fastening strip with sufiicient resistance to the pressing operation, there is guided on the magazine a clamping jaw which is caused by the mechanical action of a guide-way to press against the pile magazine that portion of the pile that is situated above the lower layers of fastening strips.

The working of such known machines presumes the previous separation of the wrapper from the wrapper web before bringing up the fastening strip. If the web were raised as a whole, it would be burst by the resulting tension.

Dead motion between those parts of the machine that efiect the distribution, may cause more or less hindrance to a sufliciently Specification of Letters Patent.

1 atented Mar. 7, 1922. Serial No. 468,965.

of the portion of the pile by I l ng aw, and thus eopardize the certainty of working of the machine.

In the improved machine hereinafter described there is employed for pressing the pile of fastening strips against the reciproeating magazine likewise a clamping jaw which, however, according to this invention, is caused to move up and down with the magazine by the action of a device (for in stance a spring) which has a constant tendency to press it yieldingly against the pile of fastening strips and is operated by means of fixed stops in such a manner that in the descent of the magazine the clamping jaw is moved towards the pile of fastening strips, and is moved away again from the said pile during the ascent of the magazine, so that the bottom fastening strip in being delivered is loaded with the weight of the magazine and also with the weight of the pile, whilst the pile can sink as the magazine rises.

By this means an elastic pressure is permanently secured which is independent of any dead motion.

In the improved machine the pile of fastening strips is pressed on to the wrapper web that is travelling underneath it and has not yet been cut up into wrappers. Consequently, the cutting up of the wrapper strip need be effected onl after the fastening strip has been pasted on. This method of working assures a proper application of the fastening strip at the desired place, and in the correct position so that throw-outs are thus completely avoided.

3r constructional form of this invention is illustrated in the drawings in which l j l is a side elevation of the magazine with appurtenant parts, in the raised position with loosened clamping jaws, and

Fig. 2 is likewise a side elevation in partial section in the bottom position.

Fig. 3 is a vertical section on the line of Fig. 2.

Figs. at and 5 magazines in. the and 2.

(Z, c are feed rollers mounted on the machine framing a in front of and behind a support 5 for the web 0 of wrapping paper travelling over it.

These rollers are driven by suitable means and serve to feed the paper web 0 stepby step.

are rear elevations of the positions shown in Figs. 1

is guided vertically above The magazine 7 on the f ceives no weight for pressing down the pile of strips, so that the latter can be replenished without hindrance.

On the magazine 7 there is mounted at h a clamping jaw i which, when free, is pressed against the pile of strips .9 by a spring 7 acting upon the arm 2' of the said In the ascent of the magazine f, the arm 1 strikes a fixed stop Z on the framing a, thereby raising the clamping jaw 71 from the pile s so that vthe latter can drop freely.

.The pile then rests at its edges up on side ledges f (Fig. 3).

After the jaw a has been lifted off the pile s, a pawl m mounted at m on the magazine engages with its nose m in front of a second arm i of the clamping jaw e', and.

thereby holds the latter fast in the lifted off position. V

In the path of the pawl m there is situated on the framing a a stop a which releases the said pawl when the magazine f in its descent is situated just above the wrapper c. The said wrapper has received an application of adhesive at the place at which the fastening strip'is to be carried along by it. Immediately the pawl on has been released by the stop a, the jaw i is caused by the action of the spring to clamp the pile s firmly against the magazine 7", leaving the bottom layers of the strip free, so that the magazine will press with all its weight the bottom strip against the paper web 0 at the place that has been dabbed with adhesive. 7

In the ascent of the magazine f, the pile of strips 8 remains clamped until the arm i strikes the stop 1.

In this condition the bottom layers of the pile of strips are relieved of pressure', and the'bottom strip, which was pressed against the pasted place on the paper web 0, canbe easily withdrawn from the magazine.

By this means the sticking of the fastening strip upon the proper place of the strips, is always properly done and secured in each case.

The improved machine therefore delivers the goods in a perfectly uniformly wrapped condition.

Having thus particularly described the nature of my invention, what I claim as new and desire to secure by Letters Patent of the United States is: 7

Apparatus for delivering fastening strips for wrapping machines, comprising in combination a magazine containing a pile of fastening strips, said' magazine being adapted to be reciprocated vertically, a clamping j aw pivotally secured to said magazine and adapted to press the pile of fastening strips above its lower layer during the delivery of the bottom layer against the magazine, a spring connected at one end to the magazine and at its other end to a projecting arm of said clamping jaw, said spring being adapted to impart to said a constant tendency to press against the pile of strips, and fixed stops on the machine frame, adapted to cause saidclamping jaw to be operated, so that it may move toward the pile of strips during the descent of the magazine and away again from the pile of strips during the ascent of the magazine.

In testimony whereof I affix my signature in presence of two witnesses.

' KARL OTTING.

. \Vitnesses ALFRIEDE 'LADGER, LEO TOLLES. 

